描述 Description

DMS-20LCD Series, 3.5 Digit, LCD Display, Digital Voltmeters represent the ultimate combination of low price, low power, small size and high performance in digital meters. Epoxy encapsulated in a subminiature (1.38'' x 0.88'' x 0.43''), 12-pin DIP package, these completely self-contained, fully operational meters offer a combination of ruggedness, long-term reliability and component-like ease-of-use simply not available in any other meters. Incorporating a precision reference and a factory-calibrated, autozeroing A/D converter, DMS-20LCD meters are extremely accurate (+/-1 count) and are only slightly larger than their 0.37/9.4mm, enhanced-contrast, LCD displays. All models incorporate a built-in bezel and are easily mounted in either panels or pc boards. Both backlit and non-backlit versions are available. DMS-20LCD meters have 4 differential input voltage ranges (+/-200mV, +/-2V, +/-20V and +/-200V) and a user-friendly input structure. Input impedance is a minimum 800k . CMRR is typically 86dB with a CMV of +/-2V. Non-inverting inputs are overvoltage protected to +/-100V (+/-250V for the +/-200V input model). All DMS-20LCD meters operate from a single +5V supply (drawing 400?A) or a single +9V supply/battery (drawing 230?A). All models have a low-battery (B) annunciator and feature autopolarity changeover and overrange indication. Also available is an application/evaluation board (DMS-EB2) that plugs directly onto the back of any DMS-20LCD allowing direct inputs for common applications such as 4-20mA inputs, zero/gain adjust, decimal point location, and input voltage dividing.